M,CaC2= 64g/mol
p=m,px100/mi---> mp= 200x64/100g= 128g CaC2
niu=m/M= 128g/64g/mol= 2mol CaC2
1mol..................................1mol
CaC2 + H2O----> C2H2 +CaO
2mol.............................x=2mol
V=niuXVm=2X22,4 L= 44,8 L
LA b) nu stiu ce se cere
c) 2mol